All 16 tools are free with daily caps. Studio unlocks the unified workbench, 24-bit WAV stems, saved sessions, API access and 50× higher quotas. Two honest tiers — no upsell hidden in the middle.
All 16 tools, no signup. Drop a track, get the answer.
The unified workbench. One upload runs every module at once.
Yes — all 16 tools, every export, every quality tier. Free is supported by short video ads at upload, analyse and tab-switch. The Studio surface is not part of Free.
Free is the no-signup, single-pass tool experience: drop an audio file, get one answer. Studio is the unified workbench — one upload runs every module at once (BPM, key, stems, MIDI, mix, release) — plus 24-bit WAV stems, saved sessions, batch upload, API access, no watermark and 50× higher daily quotas.
No. Tool pages and the Studio workbench are ad-free for every user. Ads only appear on long-form learning pages (the glossary and chart guides) where they don't interrupt a workflow.
Yes — monthly billing, cancel from a single click. Annual plans are prorated if you cancel mid-year.
Yes — BPM, key, stems, MIDI you generate are yours to use commercially without attribution on every plan.
Yes — 50% off Studio with a valid .edu / .ac.uk email. Email education@signalkey.io to claim.
No card, no signup. Drop a track and we'll show you exactly what SignalKey can do — BPM, key, stems, MIDI, mastering, the lot.